SVR has (or at least had) bonus time. It's been a while, but the last time I used it, I think we paid about $60 for a one-BR.

Let me call them and find out. I only want to add 1 or 2 nights and think it is not "ethical" to use XYZ for it as it is going to waste the rest of the week for the resort. So I would rather just pay for the additional nights as long as it is not too much more.